Research Article
Long-Term Cosmic Ray Variability and the CME-Index
Table 1
Cross-correlation coefficients and the corresponding time lags for the entire period (1996–2011).
| Indices | Correlation coefficients () (95% significance level) | Time lags (months) |
| Sunspot number | −0.91 ± 0.01 | +14 | Coronal mass ejections index | −0.84 ± 0.01 | 0 | Interplanetary magnetic field IMF | −0.86 ± 0.01 | +1 | Heliospheric current sheet HCS | −0.82 ± 0.01 | +8 |
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